This appeal presents the question whether proof of loss causation is an essential element of an action under Section 12(2) of the Securities Act of 1933, 15 U.S.C. § 77i (1982), when the defendant is a collateral participant in a securities transaction and not an actual seller. The law firm Ruffa & Hanover appeals from a judgment, entered after a trial before Judge Sprizzo, holding it liable under Section 12(2) for having prepared and distributed a private-placement memorandum in connection with a private offering conducted by one of the firm’s clients. The private-placement memorandum misstated a material fact. The district court held that plaintiff was not required to prove loss causation — in other words, that the material misstatement pertained to the ultimate cause of his damages — in order to recover against Ruffa & Hanover. We disagree and accordingly reverse.
BACKGROUND
In March 1981, plaintiff Kenneth J. Wilson was solicited to invest in the stock of Saintine Exploration and Drilling Corp., a newly formed contract driller of oil and gas wells. Fred Rodolfy, a principal shareholder of the company and chairman of its board of directors, told Wilson that Sain-tine was going to drill for oil in Honduras and would make a good investment. In early April, Ruffa & Hanover, Saintine’s counsel, sent Wilson a “Confidential Private Placement Memorandum” and a “Subscription Package” for the private offering of 1,000,000 shares of Saintine’s common stock. Ruffa & Hanover had prepared the memorandum and the other documents relating to Saintine’s offering, and had forwarded these materials to Wilson at the request of Rodolfy and Robert D.P. Welch, Saintine’s president. In mid-April, Wilson received a revised version of the private-placement memorandum, also prepared by Ruffa & Hanover.
The private-placement memorandum explained that Saintine had been formed in part for the purpose of participating in a joint venture to explore for and to develop petroleum products under certain concessions granted by the government of Honduras. In addition, the memorandum stated that:
The Company has contracted for the purchase from Centurion Oil & Minerals Company (“Centurion”), a Texas corporation, of Centurion’s rights, pursuant to joint venture arrangements between Centurion, Petróleos Yojoa, S.A., a Honduras corporation (“Peysa”), Compañía Explo-rada, S.A., a Honduras corporation (“Coexsa”), and Compass Corporation, a Texas corporation (“Compass”), regarding the exploration for and development of the oil and gas resources contained in certain tracts of land located in the Republic of Honduras (the “Honduran Concessions”). Approximately 114,988 acres are the subject of the Republic of Honduran government concessions granted by Peysa. Coexsa has applied to the Minister of Natural Resources of the Republic of Honduras for a concession covering 59,280 additional acres. The agreement between Centurion and Saintine provides that Centurion will also assign to Sain-tine its rights with respect to concessions granted to Saintine by the Honduran government.
# # # # * *
*83Saintine agreed to purchase Centurion’s interest in the venture and, accordingly, in its interest in production from the Concession, for $200,000. The terms of the agreement also provides [sic] that Centurion will retain a 4% working interest in production obtained from wells drilled on the Concessions by Saintine and that in the event that Saintine shall acquire any further concessions to explore and develop properties in Honduras, Saintine shall grant to Centurion a 1% overriding royalty in production from such additional concessions. The closing of the agreement between Centurion and Saintine is scheduled to take place on or about June 30, 1981.
(emphasis added). The district court found, however, that Centurion and Saintine did not enter into an agreement with respect to the Honduran concessions until May 27, 1981, and accordingly that the April private-placement memorandum had falsely stated that the firms had reached such an agreement at that time. Specifically, the court found “incredible,” in light of contrary documentary evidence, the testimony of William P. Ruffa (of Ruffa & Hanover) that an oral agreement had in fact been reached at the time the private-placement memorandum was issued.
On May 28, 1981, after receiving the private-placement memorandum and offering documents but before Saintine actually finalized the contractual arrangements described above, Wilson purchased 90,000 shares of Saintine common stock for $36,-000. Although the false statement about the contractual arrangements was cured after Wilson’s purchase, Saintine never engaged in any drilling in Honduras. In early 1982, Rodolfy telephoned Wilson to tell him that “[y]ou can expect a call from Mr. Welch, offering you your money back.” According to Wilson, Rodolfy “said that they had done something wrong, or that the concession was wrong, something of that sort.... And I said, fine, I would be happy to have my money back.” Soon thereafter, Welch refunded only $5,000 of Wilson’s investment with the vague explanation that “[w]e are somewhat disappointed on the sale of an asset for Sain-tine Exploration & Drilling Corporation.” Welch nevertheless promised that the remaining $31,000 would be refunded within ninety days.
The refund never arrived, however, prompting Wilson to bring this suit against, among others, Saintine, Welch’s estate, Rodolfy and Ruffa & Hanover. Wilson alleged that the defendants had violated Section 10(b) of the Securities Exchange Act of 1934, 15 U.S.C. § 78j(b) (1982), Rule 10b-5 thereunder, 17 C.F.R. § 240.10b-5 (1987), and Section 12(2) of the '33 Act. Wilson’s Section 10(b) claim against Ruffa & Hanover was dismissed before trial under Fed.R.Civ.P. 9(b) for failure to plead fraud with particularity. After a one-day bench trial, Judge Sprizzo entered judgment against Welch’s estate, which defaulted, and against Rodolfy and Ruffa & Hanover. The court awarded plaintiff $47,513.40 in damages, including prejudgment interest.
The district court found that the defendants knew that the statement in the private-placement memorandum was false. As to Ruffa & Hanover, the district court held that, even though the law firm was not actually a seller of securities,
the evidence clearly establishes the type of material participation which the case law would find sufficient [to support liability]. They prepared the offering statement, they participated extensively [in] preparing the contents of that statement, they knew it was being sent to the offer- or, indeed they sent the first offering statement to Wilson.
The court also rejected Ruffa & Hanover’s contention that plaintiff should have been required to prove loss causation, stating that “th[e] material omission is not cured by the fact that, as defendants argue[,] ... the plaintiff was damaged by Welch’s running away with the money rather than by their false statements ... in the offering statement.” This appeal followed.1
*84DISCUSSION
The Securities Act of 1933 and the Securities Exchange Act of 1934 provide a number of private rights of action imposing liability upon certain parties in particular kinds of securities transactions. See, e.g., Securities Act of 1933, § 11, 15 U.S.C. § 77k (1982) (liability upon issuer, officers and directors of issuers, and signatories, for misstatements and omissions in registration statements); id. § 12(1), 15 U.S.C. § 77Z(1) (1982) (liability upon offerors and sellers of unregistered securities); id. § 15, 15 U.S.C. § 77o (1982) (liability of persons who control persons liable under Sections 11 and 12); Securities Exchange Act of 1934, § 9(e), 15 U.S.C. § 78i(e) (1982) (liability for various acts of market manipulation); id. § 18, 15 U.S.C. § 78r (1982) (liability for false and misleading statements in documents filed with SEC). All of these provisions carefully distinguish among various actors, the standards of conduct applicable to each, the measure of available damages, and the procedural hurdles plaintiffs must clear to succeed on their claims. The provision at issue in this case, Section 12(2) of the '33 Act, provides that
[a]ny person who ... offers or sells a security ... by means of a prospectus or oral communication, which includes an untrue statement of a material fact or omits to state a material fact necessary in order to make the statements, in the light of the circumstances under which they were made, not misleading (the purchaser not knowing of such untruth or omission), and who shall not sustain the burden of proof that he did not know, and in the exercise of reasonable care could not have known, of such untruth or omission, shall be liable to the person purchasing such security from him, who may sue either at law or in equity in any court of competent jurisdiction, to recover the consideration paid for such security with interest thereon, less the amount of any income received thereon, upon the tender of such security, or for damages if he no longer owns the security.
15 U.S.C. §771 (2). Section 12(2) thus provides for liability in favor of purchasers of securities against offerors or sellers who negligently make misleading statements or omissions, without regard to whether the purchaser actually relied upon the misleading communication. See, e.g., Akerman v. Oryx Communications, Inc., 810 F.2d 336, 344 (2d Cir.1987); Sanders v. John Nuveen & Co., 619 F.2d 1222, 1225 (7th Cir.1980), cert. denied, 450 U.S. 1005, 101 S.Ct. 1719, 68 L.Ed.2d 210 (1981). It also provides the remedy of rescission to a purchaser who continues to hold the security and thus compensates for all losses, whether or not caused by the misstatement.
Because the language of Section 12(2) applies only to offerors and sellers of securities (although persons controlling such offerors and sellers may be liable through Section 15), some courts have taken the view that privity between the plaintiff and defendant must be shown. See, e.g., Barker v. Henderson, Franklin, Starnes & Holt, 797 F.2d 490, 494 (7th Cir.1986) (dicta); Collins v. Signetics Corp., 605 F.2d 110, 113 (3d Cir.1979) (“This section is designed as a vehicle for a purchaser to claim against his immediate seller. Any broader interpretation would not only torture the plain meaning of the statutory language but would frustrate the statutory schema— ”); see also Harrison v. Enventure Capital Group, Inc., 666 F.Supp. 473, 475-76 (W.D.N.Y.1987) (criticizing and declining to follow contrary Second Circuit precedent in view of Supreme Court’s restrictive approach to implied rights of action). Other courts, including ours, have held that under some circumstances persons other than actual sellers may be held liable under Section 12(2). Of these courts, the majority have expansively interpreted the term “seller.” For example, the Fifth and Eleventh Circuits have held that a seller under Section 12 includes persons who “proximately caused” a securities transaction, Croy v. Campbell, 624 F.2d 709, 713 (5th Cir.1980), or even “those whose participation in the buy-sell transaction is a substantial factor in causing the transaction to *85take place.” Foster v. Jesup & Lamont Secs. Co., 759 F.2d 838, 844 (11th Cir.1985) (quoting Pharo v. Smith, 621 F.2d 656, 667 (5th Cir.1980)).
We have taken a different approach, and have somewhat imprecisely held that a person who makes a misrepresentation, but who “is not the immediate and direct seller of the securities,” may nevertheless be held liable under Section 12(2) “as a participant, aider and abettor, or coconspirator.” Mayer v. Oil Field Sys. Corp., 803 F.2d 749, 756 (2d Cir.1986). However, we have also recognized that because Section 12(2) applies to all sales of securities, application to nonselling collateral participants of the full liability of sellers under Section 12(2) would vastly expand liability under the securities laws. Accordingly, we have held that Section 12(2) requires a showing of “privity or, in the absence of privity, scienter.” Lanza v. Drexel & Co., 479 F.2d 1277, 1298 (2d Cir.1973) (in banc) (footnote omitted). As under Section 10(b), proof of scienter requires that the plaintiff “demonstrate ‘knowing or intentional misconduct’ on the part of the defendant, or an ‘intent to deceive, manipulate, or defraud’ investors.” Wechsler v. Steinberg, 733 F.2d 1054, 1058 (2d Cir.1984) (quoting Ernst & Ernst v. Hochfelder, 425 U.S. 185, 197, 193, 96 S.Ct. 1375, 1382, 1380, 47 L.Ed.2d 668 (1976)), cited in Mayer, 803 F.2d at 756.
On appeal, Ruffa & Hanover does not dispute the district court’s finding that it acted with scienter in preparing and distributing the private-placement memorandum. Rather, the law firm contends that the district court erred in holding that loss causation was not an element of, a Section 12(2) claim against a nonselling collateral participant in a securities transaction.2 Loss causation, of course, could not be proven here because the Honduran concession agreement was in fact executed on May 27, 1981 — one day before Wilson purchased his stock and one month before, according to the private-placement memorandum, the closing was to take place. We agree that plaintiff’s inability to prove loss causation is fatal to his claim under Section 12(2).
The Supreme Court has repeatedly emphasized that respect for the interdependence of the various provisions of the securities laws must play a central role in their interpretation. In Ernst & Ernst v. Hochfelder, 425 U.S. 185, 96 S.Ct. 1375, 47 L.Ed. 2d 668 (1976), for example, which held that scienter was a required element of an action under Section 10(b), the Court relied in part upon the need to avoid “nullifying] the effectiveness of the carefully drawn procedural restrictions on [the] express actions” authorized by Sections 11, 12(2) and 15 of the ’33 Act. Id. at 210, 96 S.Ct. at 1389. By the same token, just as “[a] court must take care lest the implied right of action under [Section 10(b) ] unravel the presumptions and defenses created by Congress,” Barker, 797 F.2d at 495, we must take care to avoid reading the more particularized rights of action so expansively as to undo the restrictions that have been imposed by the courts upon Section 10(b). Section 10(b) was designed by Congress to be the “catchall” provision filling the interstices between other private rights of action, see Hearings on H.R. 7852 and H.R. 8720 Before the House Comm, on Interstate and Foreign Commerce, 73d Cong., 2d Sess. 115 (1934) (remarks of Senator Corcoran), quoted in Hochfelder, 425 U.S. at 202, 96 S.Ct. at 1385, and interpretation of those other actions must respect the contours of Section 10(b) lest they, by expansive interpretation, become “catch-alls.”
We have long held that, in suits brought under Section 10(b) and Rule 10b-5, “the plaintiff must show both loss causation —that the misrepresentations or omissions caused the economic harm — and transaction causation — that the violation in question caused the [plaintiff] to engage in the transaction in question.” Bennett v. United States Trust Co., 770 F.2d 308, 313 (2d Cir.1985), cert. denied, 474 U.S. 1058, 106 S.Ct. 800, 88 L.Ed.2d 776 (1986) (quoting Schlick v. Penn-Dixie Cement Corp., 507 F.2d 374, 380 (2d Cir.1974), cert. denied, 421 U.S. 976, 95 S.Ct. 1976, 44 L.Ed.2d 467 *86(1975)). Transaction causation, of course, is simply reliance, see Schlick, 507 F.2d at 380, and, in the case of misstatements, is established by allegations and proof that the transaction in question would not have occurred “but for” the misstatement. See Chemical Bank v. Arthur Andersen & Co., 726 F.2d 930, 943 & n. 23 (2d Cir.), cert. denied, 469 U.S. 884, 105 S.Ct. 253, 83 L.Ed.2d 190 (1984). Loss causation, on the other hand, requires a “direct or proximate relationship between the loss and the misrepresentation,” Bennett, 770 F.2d at 314, and “may not be supplied by ‘but for’ allegations.” Bloor v. Carro, Spanbock, Londin, Rodman & Fass, 754 F.2d 57, 61 (2d Cir.1985) (citing Chemical Bank, 726 F.2d at 943).
We believe that a Section 12(2) action against nonselling collateral participants such as Ruffa & Hanover requires proof of both loss causation and transaction causation. To hold otherwise would effectively nullify the important requirement that both these elements be proven in Section 10(b) actions, and many suits against nonsellers that would fail under Section 10(b) would succeed under Section 12(2). Section 12(2) would then supplant Section 10(b) as the “catch-all clause to prevent manipulative devices.” Hearings on H.R. 7852 and H.R. 8720 Before the House Comm. on Interstate and Foreign Commerce, 73d Cong., 2d Sess. 115 (1934) (remarks of Senator Corcoran), quoted in Hochfelder, 425 U.S. at 202, 96 S.Ct. at 1385. This would constitute a result of no small significance, given the tendency of sellers to disappear into either Chapter 11 or the Cayman Islands, and “the practice of plaintiff's counsel in suing everyone, no matter how remotely connected with the transaction, who might have the ability to pay the judgment.” R. Jennings & H. Marsh, Securities Regulation 1134 (5th ed. 1982).
We do not mean to suggest, of course, that plaintiffs must demonstrate loss causation or transaction causation in suits against actual sellers or those who control them. In drafting Section 12(2), Congress obviously sought to provide a heightened deterrent against sellers who make misrepresentations, by rendering tainted transactions voidable at the option of the defrauded purchaser regardless of whether the loss is due to the fraud or to a general market decline. Yet this heightened deterrent is expressly directed only at actual sellers and those who control them. We recognized this fact when, in extending the scope of Section 12(2) beyond its plain terms to collateral participants, we required that scienter must be proven as to them although a showing of negligence would suffice as to sellers. Lanza v. Drexel & Co., 479 F.2d at 1298. For similar reasons, we believe that a showing of loss causation is necessary to hold collateral participants liable under Section 12(2). We recognize that our holding renders actions against collateral participants under Section 12(2) essentially identical to actions under the “catch-all” Section 10(b). That is not an anomalous result, however, in light of the cumulative nature of the remedies under the 1933 and 1934 Acts. See Herman & MacLean v. Huddleston, 459 U.S. 375, 383-87, 103 S.Ct. 683, 687-89, 74 L.Ed.2d 548 (1983).
Reversed.
. Rodolfy also appealed, pro se. Since he is liable as a controlling person under Section 15 of the ’33 Act, 15 U.S.C. § 77o (1982), we have *84affirmed the judgment against him by summary order dated today.
. The parties agree that plaintiff was not in privity with Ruffa & Hanover.